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If a element M has mass number 24 and atomic number 12 , how many neutrons does it's atom contain ?

Dear student,

Mass number = 24
Atomic number = 12
Number of electrons = Number of protons = 12
Number of neutrons = Mass number - Number of protons 
                                   = 24 - 12
                                   = 12
Hence, the total neutrons are 12.

Regards

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Your solution!!! I hope it would be helpful to you....

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Thanks both of u !!
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No he isn't correct it can only be 12 I've solved clearly
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Hmmm... 12 is correct..
Usko thank u kis aur vajah se bola !!
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All right
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Atomic mass - No. Of protons = 24-12 = 12 Total nutrons are 12
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Usse ne mujhe sikhaya hai ki we should not trust anyone blindly !!
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